State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

Electric-field-induced electrochemical transformation of shale oil for in situ upgrading: Molecular evolution, interfacial regulation and hydrogen generation

Simultaneous shale-oil upgrading, hydrogen evolution, and interfacial regulation through electrically induced electrochemical transformation represents a potential strategy for enhancing hydrocarbon resource utilization. In this study, a shale oil–water system was subjected to di...

Microwave–water effects on hydrocarbon mobility in lacustrine shale reservoirs

Microwave irradiation provides a promising in-situ strategy for improving shale oil recovery, yet the role of abundant residual water retained after hydraulic fracturing in microwave-induced nanopore reorganization remains insufficiently constrained. To address this gap, this stu...

Differentiating W and W–Sb mineralization in the Xuefeng Uplift, South China: An integrated study of scheelite geochemistry

The Xuefeng Uplift Belt in Hunan Province, South China, represents a transitional metallogenic domain between the Nanling Region and Jiangnan Orogen, hosting a series of Au–Sb–W polymetallic deposits formed under contrasting metamorphic and magmatic-hydrothermal regimes. To eluci...

Spatial Redistribution of Gas Hydrates and Its Impact on Pressure-Limited Restart in Deepwater Subsea Flowlines

Hydrates formed during a subsea flowline shutdown can persist as deposits that restrict the subsequent restart. Assessing restartability therefore requires both thermodynamic conditions and the pressure needed to recover flow. This study develops a one-dimensional screening model...

New insights of geochemical interactions between h2 and minerals in underground hydrogen storage: Experimental studies and geochemical simulation

Underground hydrogen storage (UHS) has emerged as one of the most promising technologies for addressing the critical demand for large-scale clean energy storage. However, current understanding of the geochemical behavior of H 2 interacting with minerals within underground reservo...

Numerical simulation study on critical liquid and sand carrying velocities of gas-liquid-sand multiphase flow in vertical and horizontal wellbore sections

A segmented simulation is used to examine flow behaviors in vertical and horizontal shale-oil wellbores. Built with Poly-Hexcore meshing, the model couples Euler-Euler and KTGF approaches, and incorporates the Dranchuk-Abu-Kassim equation for real-gas compressibility along with a...

OIB‐Type Garnet Amphibolites From the Xuerongzangbu Area, Central Lhasa Terrane, Tibet: Implications for Songduo Paleo‐Tethys Ocean Evolution and Permian Mantle Activity Along North Gondwana

Abstract Whether the Songduo metamorphic belt represents an in situ Paleo‐Tethyan suture within the Lhasa Terrane or far‐traveled allochthonous high‐pressure slices, and how Permian mantle activity along the North Gondwana margin relates to subsequent Tethyan evolution, remain ce...

From pore-scale mechanisms to hydraulic-work analysis: a microfluidic study of CO2-EOR via WAG, FWAG, and PWAG

To mitigate severe gas channeling and poor volumetric sweep during CO 2 flooding in low-permeability conglomerate reservoirs, WAG and its enhanced variants, FWAG and PWAG, are widely used for mobility control. However, pore-scale evidence remains limited on how flow resistance, f...

CO2 Extraction of Shale Oil from Nanoscale Variable-Diameter Blind Pores from a Molecular Dynamic Perspective

Shale oil, despite its substantial reserves and significant development potential, presents a great extraction challenge. The existence of micro- and nanopores within shale formations renders conventional recovery methods largely ineffective, resulting in a limited recovery facto...

A Digital Delivery Framework for Precision Carbon Management in Gas Gathering Systems: From Tiered Accounting to Reduction Optimization

With the tightening of global methane regulations (EU Methane Regulation 2024/1787, U.S. EPA GHG rules, OGMP 2.0) and China’s dual-carbon commitments, precise and traceable carbon accounting for natural gas gathering systems has become an urgent engineering imperative. To tackle...

Optimization of Intermittent Defoamer Injection in Foam-Assisted Gas-Well Deliquification: Experimental and Theoretical Investigation

Low-pressure gas wells treated by foam-assisted deliquification often suffer from poor temporal coordination between foamer and defoamer injection, excessive defoamer consumption under continuous dosing, and foam carryover into surface facilities. This study proposes a coordinate...

Effects of Cr, Al, and Mo on the Mechanical Properties and CO2 Corrosion Resistance of Cr-Al Alloyed Oil Well Tubular Steel

CO2 corrosion is one of the major failure mechanisms affecting oil well tubular steels during oil and gas extraction. Although high-Cr stainless steels exhibit excellent corrosion resistance, their high cost limits practical applications. Therefore, developing economical low-Cr s...

Research on the Geochemical Characteristics of Quaternary Biogenic Gas Source Rocks in the Linhe Depression of the Hetao Basin: A Case Study of Well LQY1

ABSTRACT To characterize the characteristics of Quaternary biogenic gas source rocks in the Linhe Depression of the Hetao Basin, total organic carbon (TOC), Rock‐Eval pyrolysis, and gas chromatography–mass spectrometry (GC–MS) analyses were carried out on 15 samples from Well LQY...

Novel Technique to Enhance Hydraulic Fracture Permeability by Controllable Biomimetic Mineralization: Transitioning from Liquid Injection to Solid Propping

Abstract Unconventional oil and gas have been playing an increasingly important role in the global energy market. The primary development technique for shale and tight reservoirs is hydraulic fracturing, which aims to create high-permeability channels propped by quartz sand or ce...

Bio‐Inspired Bidirectional Proton Regulatory Mechanisms by Anhydride‐Based Hydrogel Electrolytes for High‐Performance Aqueous Zinc‐Ion Batteries

ABSTRACT Aqueous zinc‐ion batteries (AZIBs) employing hydrogel electrolytes offer significant advantages in mitigating short‐circuit and electrolyte leakage risks. Nevertheless, the sluggish transport kinetics of Zn 2 + and severe interfacial instability of zinc anodes still seve...

Experimental Measurement and Artificial Neural Network Prediction of Dew Point Pressure for Ultra-Deep Condensate Gas

The development of oil and gas resources in global petroliferous basins has extended from shallow to deep reservoirs. Dew point pressure (Pd) is a vital parameter for fluid characterization and field development. Accurately and quickly obtaining Pd is crucial for the development...

Particle-scale discrete-element analysis of soundless cracking agent-induced fracture evolution in coal under laboratory-informed radial loading

Soundless cracking demolition agents (SCDAs) provide a non-explosive method for coal fracturing, but the particle-scale evolution of force transmission and bond failure under laboratory-informed loading remains unclear. This study combines free-volume expansion, steel-tube confin...

Geomechanical Characteristics of Cretaceous Ultra-Deep Sandstone Reservoirs in the Southern Keshen Area, Kuqa Depression: Implications for Exploration and Development

Significant progress has been made in exploring ultra-deep tight sandstone gas in the Tarim Basin, but sweet spot prediction remains challenging in the Keshen block of the Kuqa Depression. Based on integrated geological, experimental, and seismic data, this study characterizes th...

Ni/Mg‐Doped Ceria Interface Enhances Concentrated Solar‐Driven CO 2 Reduction With CH 4

ABSTRACT Concentrated‐solar catalytic conversion of carbon dioxide (CO 2 ) offers a promising route to utilize greenhouse gases via renewable energy. Dry reforming of methane (DRM) is particularly attractive, converting both CO 2 and methane (CH 4 ) into valuable syngas (CO and H...

Buried fragments reveal a “Greater Gondwana” supercontinent

Profound global biogeochemical shifts marked the Ediacaran-Cambrian transition [550–500 million years (Ma)], a phenomenon often ascribed to the dynamics of supercontinent cycles. However, Gondwana is frequently denied supercontinent status due to its perceived spatial deficit (∼6...